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首页> 外文期刊>Journal of Cellular Physiology >Emerging role of angiogenin in stress response and cell survival under adverse conditions
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Emerging role of angiogenin in stress response and cell survival under adverse conditions

机译:血管生成素的应激反应和新兴的角色细胞在不利条件下生存

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摘要

Angiogenin (ANG), also known as ribonuclease (RNASE) 5, is a member of the vertebrate-specific, secreted RNASE superfamily. ANG was originally identified as a tumor angiogenic factor, but its biological activity has been extended from inducing angiogenesis to stimulating cell proliferation and more recently, to promoting cell survival. Under growth conditions, ANG is translocated to nucleus where it accumulates in nucleolus and stimulates ribosomal RNA (rRNA) transcription, thus facilitating cell growth and proliferation. Under stress conditions, ANG is accumulated in cytoplasmic compartments and modulates the production of tiRNA, a novel class of small RNA that is derived from tRNA and is induced by stress. tiRNA suppress global protein translation by inhibiting both cap-dependent and -independent translation including that mediated by weak IRESes. However, strong IRES-mediated translation, a mechanism often used by genes involved in pro-survival and anti-apoptosis, is not affected. Thus, ANG-mediated tiRNA reprogram protein translation, save anabolic energy, and promote cell survival. This recently uncovered function of ANG presents a novel mechanism of action in regulating cell growth and survival.
机译:血管生成素(ANG),也称为核糖核酸酶(核糖核酸酶)5,的一员vertebrate-specific,核糖核酸酶分泌总科。ANG最初确认为肿瘤血管生成因子,但其生物活性已经从诱导血管生成扩展刺激细胞增殖和最近,促进细胞的生存。条件,盎是转移到细胞核它在核仁积累和刺激核糖体RNA (rRNA)转录,因此促进细胞生长和增殖。应力条件下,和积累细胞质隔间和调节生产tiRNA、小说类的小RNA这是来自tRNA,引起的压力。通过抑制帽依赖和独立翻译包括由弱ires。翻译,通常使用的基因机制参与pro-survival和抗凋亡不受影响。保存合成代谢能量,蛋白质翻译促进细胞的生存。和功能提出了一个新颖的机制行动在调节细胞生长和生存。

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